Telegraphy – Systems – Position coordinate determination for writing
Patent
1987-10-02
1989-08-08
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
178 19, G08C 2100
Patent
active
048555380
ABSTRACT:
A digitizer comprising a measuring table having a substrate on which a grid is mounted, and a movable coil inductively coupled to the grid. When a time variable current is applied, a variable magnetic flux produces a measuring signal in the form of an induced voltage. The grid is a plurality of side-by-side, parallel conductors, each having opposite axial ends and arranged in pairs. A bridge is provided between adjacent ends of a plurality of the pairs of conductors. Current flowing into the opposite end of one conductor of a pair of conductors, thus, produces oppositely directed magnetic fields around the conductors of the pair, or a changing magnetic flux produced by the coil and interacting with the conductors of a pair induces voltages of opposite polarity in the conductors of the pair.
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Jacob-Grinschgl Wolfgang
Muller Udo
Johnston George W.
Kontron Holding A.G.
Leon Bernard S.
Saxe Jon S.
Schreyer Stafford D.
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